<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="/js/vue.js"></script>
</head>
<body>
    <div id="app">{{msg}}</div>
</body>
<script>
    var vm = new Vue({
        el:'#app',
        data:{
            msg:'初始数据'
        }
    })
    console.log('vm.$data.msg:'+vm.$data.msg)
    console.log('vm.msg:'+vm.msg)
</script>
</html>